In my country (and probably most others too) the following rule applies: If you're on the motorway, you don't slow down for incoming traffic on motorway ramps from the right. But that's just what Autopilot does. It's not only dangerous, it's against the law.
I live in a country with 3 language "zones" (Americans: Think of Canada with english and french parts). It's just so emberassing to hear the navigation system saying "lachaudefonds" when it should say "La Sho dfon" - and street names are even worse.